WO2018083069A1 - Procédé de scellement de cavités dans ou adjacentes à une gaine de ciment durcie entourant un tubage de puits - Google Patents

Procédé de scellement de cavités dans ou adjacentes à une gaine de ciment durcie entourant un tubage de puits Download PDF

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Publication number
WO2018083069A1
WO2018083069A1 PCT/EP2017/077817 EP2017077817W WO2018083069A1 WO 2018083069 A1 WO2018083069 A1 WO 2018083069A1 EP 2017077817 W EP2017077817 W EP 2017077817W WO 2018083069 A1 WO2018083069 A1 WO 2018083069A1
Authority
WO
WIPO (PCT)
Prior art keywords
expansion
expansion device
depth
casing
unexpanded
Prior art date
Application number
PCT/EP2017/077817
Other languages
English (en)
Inventor
Erik Kerst Cornelissen
Original Assignee
Shell Internationale Research Maatschappij B.V.
Shell Oil Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shell Internationale Research Maatschappij B.V., Shell Oil Company filed Critical Shell Internationale Research Maatschappij B.V.
Priority to AU2017355216A priority Critical patent/AU2017355216B2/en
Priority to CA3040818A priority patent/CA3040818A1/fr
Priority to BR112019008889-0A priority patent/BR112019008889B1/pt
Priority to EP17798147.9A priority patent/EP3535477B1/fr
Priority to US16/346,026 priority patent/US10794158B2/en
Priority to MX2019004854A priority patent/MX2019004854A/es
Priority to EA201991106A priority patent/EA037727B1/ru
Priority to CN201780067602.0A priority patent/CN110023583B/zh
Publication of WO2018083069A1 publication Critical patent/WO2018083069A1/fr

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/10Setting of casings, screens, liners or the like in wells
    • E21B43/103Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E21B43/105Expanding tools specially adapted therefor
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices, or the like
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices, or the like
    • E21B33/14Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes

Definitions

  • the invention relates to a method for sealing cavities in or adjacent to a cured cement sheath surrounding a well casing of an underground wellbore.
  • US patent 4,716,965 describes a sealing method, wherein a flexible sleeve made of elastomeric foam is wrapped around a well casing in order to seal any micro-annuli between the well casing and cement in the surrounding casing-formation annulus .
  • the known sleeve can only be arranged around the well casing and is not suitable for cladding an inner surface of the well casing since it is prone to damage and detachment therefrom .
  • a well liner or casing is locally expanded at several locations along its length by an inflatable bladder in order to generate zonal isolation.
  • a limitation of this known method is that the expansion force generated by an inflatable bladder is limited so that the bladder is not suitable for expanding a thick walled well casing together with at least an inner part of a surrounding cured cement sheath.
  • cement replacement and supplementing techniques are known as "section milling and cementing” “perforating-washing and cementing” perforating and squeezing cement or resin” and require on creating access to the annular space by milling or perforating the casing and involve complicated well interventions, some of them need the presence of a costly drilling rig at the well site.
  • the success rate of these cement replacement and or supplementing techniques is limited, generally between 30 and 60%.
  • the method comprising the steps of:
  • Figure 1 shows an example of a suitable expansion device, with edged expansion segments in an unexpanded configuration
  • Figure 2 shows the expansion device of Figure 1 with the edged expansion segments in an expanded configuration
  • Figure 3 is a longitudinal sectional view of a cemented well casing of which a short section has been expanded and pressed into the surrounding cement sheath by the edged expansion segments;
  • Figure 4 is a perspective view of another suitable expansion device
  • Figure 5 is an enlarged perspective view of the segments of expansion device of Figure 4 from a different angle of view;
  • Figures 6a and 6b respectively are a side view and a longitudinal sectional view of the expansion device of Figure 4.
  • Figures 7a to 7c show subsequent stages of operation of the expansion devices of Figure 4 in a well casing in longitudinal sectional views.
  • Applicant has found there is a need for an improved and reliable cement sheath sealing method that does not rely on replacing or supplementing materials behind the casing and that does not require the casing to be penetrated. There is also a need for an improved cost-effective and reliable cement sealing method that uses in-situ materials already in place and that can be deployed by a robust tool in a simple intervention operation preferably without use of a costly drilling rig.
  • the outer surface of the casing section can be expanded locally into the surrounding cement sheath. It has surprisingly been found that the cavities in the cement sheath can be sealed. It is believed that hardened cement will exhibit plastic deformation under the stress imposed by the local expansion of the selected casing section into the cement sheath. At least part of the outer surface of the expanded casing section and of the surrounding cement sheath may be plastically deformed, as a result of the expansion.
  • the cavities may be sealed permanently. At least, it has been found that the sealing of the cavities persists after releasing of the expansion device.
  • the retaining effect may be enhanced by plastic deformation of the cement sheath, which may cause the cavities to plastically fill up with cement.
  • the cavities may comprise micro-annuli in and adjacent to the cured cement sheath and during the expansion step the expansion device may be located at a substantially stationary depth within the wellbore.
  • the step of expanding a selected casing section is followed by moving the unexpanded expansion device up or down through the wellbore to another depth where another selected casing section may be expanded to seal micro-annuli and other cavities at that other depth. This may be repeated several times to seal micro-annuli and other cavities at several depths along the length the wellbore.
  • the method may suitably employ an expansion device for sealing cavities in or adjacent to a cured cement sheath surrounding a well casing of an underground wellbore.
  • the expansion device suitably comprises a series of circumferentially spaced edged expansion segments that are configured to be plastically expand a ring of circumferentially spaced recesses in a selected casing section and thereby press the expanded casing section into the surrounding cement sheath, thereby sealing the cavities.
  • the expansion device may be suspended from a tubular string, a wireline or an e-line through which electric and optionally hydraulic power and/or signals can be transmitted the expansion device and a control assembly at the earth surface.
  • the expansion segments may have in longitudinal direction substantially V- shaped edges and may be configured to expand the selected casing section such that it has a ring of in longitudinal direction substantially V-shaped recesses, which section is connected to adjacent non-expanded casing sections by smoothly outwardly curved concave semi-expanded casing sections.
  • the longitudinal length of the substantially V-shaped edges may be less than 20 cm, optionally less than 10 cm or less than 5 cm.
  • the expansion device may comprise a hydraulic actuation assembly that radially expands and contracts the expansion segments.
  • Figure 1 shows an embodiment of an expansion device 1.
  • the device 1 comprises edged expansion segments 2 and is configured to be moved with the expansion segments 2 in an unexpanded configuration as illustrated in Figure 1 up and down through a well casing 3 that is shown in Figures 2 and 3.
  • Figure 2 shows a well casing 3 above the expansion device 1 with the edged expansion segments 2 in an expanded configuration.
  • FIGS 1 and 2 furthermore show that the
  • expansion segments 2 comprise V-shaped outer edges 12 and a groove in which an O-shaped elastomeric ring 13 is embedded, which ring pulls the expansion segments 2 back into a retracted mode after a local casing expansion operation.
  • the outer edges 12 may, in circumferential direction, be rounded off at the edges, for example by tapered facets 14 shown in Figures 1 and 2. Herewith excessive strain concentration can be avoided which might otherwise occur when expanding the segments 2 into the casing wall.
  • Figure 3 is a longitudinal sectional view of the well casing 3 of which a short section has been expanded and pressed into the surrounding cement sheath 4 by the edged expansion segments 2.
  • the circumferentially spaced V-shaped recesses 6 are areas where the V-shaped expansion segments 2 have been radially pressed into the well casing 3.
  • the presently proposed local casing expansion method and system may be used as a remediation and/or repair technique for existing wells where a well casing string 3, which may comprise interconnected casing or liner sections, well screens and/or other tubulars, is cemented inside an outer casing 5 or rock and where there is a leak of fluids or gas in the annular area along the length of the wellbore, through the interface between the cured, hard cement and the casings or rock.
  • Figure 3 shows one of an optional range of longitudinally spaced ring-shaped expansions 6 of the inner well casing 3, whereby the outside of the casing
  • the locally applied stress from expansion of the inner casing 3 against the confined and hard cement sheath 4 is such that the confined cement directly behind the expanded ring plastically deforms, which results in improved sealing interfaces 7 and 8.
  • the unexpanded expansion device 1 may be lowered into the wellbore.
  • the unexpanded expansion device 1 is moved to a selected depth in the well casing. This typically involves lowering the unexpanded expansion device 1 to said selected depth.
  • the expansion device 1 is configured such that it can perform multiple extrusions in sequence along the length of the wellbore in a single deployment and can be easily conveyed into the wellbore to the place of interest .
  • Figure 1 furthermore shows that the expansion device 1 comprises a cone shaped expander 10, that drives the edged expansion segments 2 against and into the well casing 3 as illustrated in Figure 3.
  • the shaped expander 10 may suitably be a faceted wedge, which can be moved in longitudinal direction relative to the edged segments 2.
  • Each of the facets may contact one of the edged expansion segments 2.
  • V-shaped expansion segments 2 are pushed radially outward while the cone shaped expander 10 is moved axially relative to the casing 3 and expansion segments 2 over a fixed stroke length to generate a predetermined diameter increase or a predetermined force exerted on the casing 3.
  • the angle of the cone shaped expander 10 and matching contact areas with the expansion segments 2 are engineered to optimize force generated while minimizing friction, and preventing wear and
  • the shape of the expansion segments 2 is engineered to maximize the local
  • the cone shaped expander 10 may be actuated by a multi-piston hydraulic actuator to optimize the relation between force required, working pressure and diameter limitation.
  • Hydraulic pressure may be generated by a downhole hydraulic pump and/or by hydraulic power generated by a hydraulic pump at the earth surface that is transmitted to the expansion device via a small diameter coiled tubing, known as a capillary tube. Fluid for actuation of the hydraulic cylinder may be carried and stored in the expansion device 1.
  • the expansion device 1 may be moved through the wellbore using various deployment techniques such as slick-line, e-line, coiled-tubing or jointed pipe.
  • expansion device 1 through the well is by means of a wireline, in which case no drilling rig is required for deployment .
  • Figures 4-6 show another expansion device suitable for carrying out the method.
  • the expandable segments are embodied in the form of blades 22.
  • the blades 22 are resiliently supported on a base ring 24.
  • the blades 22 and the base ring form a monolithic piece.
  • small pieces of material may be machined away from the base ring 24 at the edges of the blades 22, as indicated by excisions 25.
  • the V-shaped outer edges 12 are provided at the other ends of the blades 22.
  • the base ring 24 may be provided with connector means 26 to secure the tool to an actuator sub (not shown) .
  • Each blade 22 may also be provided with one or more transverse through openings 16, for securing a contact block on the internal side of each blade 22, which is optimized to slidingly contact with facets of an internal wedge (the internal wedge is shown in Figures 7a - 7c) .
  • Other connection means may be employed instead or in addition thereof, including welds or adhesives.
  • the outer edges 12 may, in circumferential direction, be rounded off at the edges, for example by tapered facets 14.
  • FIGs 7a - 7c there expansion device of Figures 4 to 6 is shown in operation inside a well casing 3. In these figures, the cone shaped expander 10 is visible, which can be moved in
  • the driving force for the movement may be hydraulically applied via a hydraulic actuation assembly (not show) .
  • the cone shaped expander 10 slides along a central longitudinal mandrel (not shown) .
  • the cone may have facets, which slidingly engage with contact blocks 18 which are secured in recesses within the blades. Each facet suitably engages with one contact block 18.
  • the contact blocks 18 may be constructed from a different material than the blades 22.
  • the expansion cone 10 may be constructed from yet another material. All materials are preferably
  • chromium/molybdenum/vanadium steel and/or chromium steel different grades of chromium/molybdenum/vanadium steel and/or chromium steel.
  • other types of high strength corrosion resistant materials may be employed, such as nickel alloys.
  • the elastic properties can be tuned to function. This way, a separate spring, such as the O-shaped elastomeric ring 13 as described in reference to Figs. 1 and 2, may not be needed.
  • Figure 8 illustrates a preferred sequence of locally expanding the casing 3. Shown is a well bore after a sealing operation has been completed. First the unexpanded expansion device was moved to a selected first depth 21 in the well casing 3, upon which the edged expansion segments were expanded resulting in circumferentially spaced recesses 6 into the inner surface of the selected casing section. The outer surface of the selected the expanded casing section has been expanded into the surrounding cement sheath 4, while maintaining the expansion device located
  • the second depth 22 in this case is deeper than the selected first depth 21. It should not coincide with the first selected depth 21.

Abstract

Un procédé pour sceller des cavités dans ou à proximité d'une gaine de ciment durcie (4) entourant un tubage (3) d'un puits de forage souterrain consiste à : réaliser un dispositif de dilatation (1) pourvu de segments de dilatation biseautés (2) qui est conçu pour être déplacé avec les segments de dilatation (2) dans une configuration non dilatée, vers le haut et vers le bas dans le tubage de puits (3); déplacer le dispositif de dilatation non dilaté (1) jusqu'à une profondeur sélectionnée dans le tubage de puits (3); et dilater les segments de dilatation biseautés (2) au niveau de la profondeur sélectionnée, ce qui permet de dilater plastiquement une section de tubage sélectionnée et de comprimer la section de tubage dilatée dans la gaine de ciment environnante, scellant ainsi les cavités.
PCT/EP2017/077817 2016-11-01 2017-10-30 Procédé de scellement de cavités dans ou adjacentes à une gaine de ciment durcie entourant un tubage de puits WO2018083069A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
AU2017355216A AU2017355216B2 (en) 2016-11-01 2017-10-30 Method for sealing cavities in or adjacent to a cured cement sheath surrounding a well casing
CA3040818A CA3040818A1 (fr) 2016-11-01 2017-10-30 Procede de scellement de cavites dans ou adjacentes a une gaine de ciment durcie entourant un tubage de puits
BR112019008889-0A BR112019008889B1 (pt) 2016-11-01 2017-10-30 Método para vedar cavidades em ou adjacentes a uma bainha de cimento curado que circunda um revestimento de poço de um poço subterrâneo
EP17798147.9A EP3535477B1 (fr) 2016-11-01 2017-10-30 Procédé et système d'étanchéification de cavités dans ou adjacentes à une gaine de ciment durci entourant un tubage de puits
US16/346,026 US10794158B2 (en) 2016-11-01 2017-10-30 Method for sealing cavities in or adjacent to a cured cement sheath surrounding a well casing
MX2019004854A MX2019004854A (es) 2016-11-01 2017-10-30 Metodo para el sellado de cavidades en una vaina de cemento curado, o adyacente a esta, que rodea una tuberia de revestimiento del pozo.
EA201991106A EA037727B1 (ru) 2016-11-01 2017-10-30 Способ герметизации пустот в отверждаемой цементной оболочке, окружающей обсадную трубу скважины, или вблизи нее
CN201780067602.0A CN110023583B (zh) 2016-11-01 2017-10-30 用于密封围绕井套管的固化水泥护层中或附近的空腔的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16196704.7 2016-11-01
EP16196704 2016-11-01

Publications (1)

Publication Number Publication Date
WO2018083069A1 true WO2018083069A1 (fr) 2018-05-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/077817 WO2018083069A1 (fr) 2016-11-01 2017-10-30 Procédé de scellement de cavités dans ou adjacentes à une gaine de ciment durcie entourant un tubage de puits

Country Status (9)

Country Link
US (1) US10794158B2 (fr)
EP (1) EP3535477B1 (fr)
CN (1) CN110023583B (fr)
AU (1) AU2017355216B2 (fr)
BR (1) BR112019008889B1 (fr)
CA (1) CA3040818A1 (fr)
EA (1) EA037727B1 (fr)
MX (1) MX2019004854A (fr)
WO (1) WO2018083069A1 (fr)

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US11585178B2 (en) 2018-06-01 2023-02-21 Winterhawk Well Abandonment Ltd. Casing expander for well abandonment
US11634967B2 (en) 2021-05-31 2023-04-25 Winterhawk Well Abandonment Ltd. Method for well remediation and repair

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WO2017109508A1 (fr) 2015-12-23 2017-06-29 Peak Well Systems Pty Ltd Appareil de déploiement et de pliage et procédés d'utilisation
WO2017109511A1 (fr) 2015-12-23 2017-06-29 Peak Well Systems Pty Ltd Appareil de transfert de couple et procédés d'utilisation
CN111379534B (zh) * 2018-12-27 2022-05-10 中国石油天然气股份有限公司 套管的封堵方法
WO2022078800A1 (fr) 2020-10-12 2022-04-21 Shell Internationale Research Maatschappij B.V. Procédé de création d'un joint d'isolation de zone annulaire dans un espace annulaire de fond de trou
WO2022171604A1 (fr) 2021-02-11 2022-08-18 Shell Internationale Research Maatschappij B.V. Procédé d'abandon d'un puits de forage achevé
WO2023222738A1 (fr) 2022-05-20 2023-11-23 Shell Internationale Research Maatschappij B.V. Procédé de déformation d'un élément tubulaire de puits de forage externe

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US11585178B2 (en) 2018-06-01 2023-02-21 Winterhawk Well Abandonment Ltd. Casing expander for well abandonment
WO2020016169A1 (fr) * 2018-07-20 2020-01-23 Shell Internationale Research Maatschappij B.V. Procédé d'assainissement de fuites dans une gaine de ciment entourant un tube de puits de forage
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US11634967B2 (en) 2021-05-31 2023-04-25 Winterhawk Well Abandonment Ltd. Method for well remediation and repair

Also Published As

Publication number Publication date
CN110023583B (zh) 2021-10-15
EA037727B1 (ru) 2021-05-14
BR112019008889B1 (pt) 2023-02-14
AU2017355216B2 (en) 2020-09-10
AU2017355216A1 (en) 2019-04-18
US20190264547A1 (en) 2019-08-29
BR112019008889A2 (pt) 2019-07-09
MX2019004854A (es) 2019-08-05
US10794158B2 (en) 2020-10-06
CA3040818A1 (fr) 2018-05-11
EA201991106A1 (ru) 2019-09-30
CN110023583A (zh) 2019-07-16
EP3535477A1 (fr) 2019-09-11
EP3535477B1 (fr) 2020-09-23

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